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Lubuntu is the only system on the computer, I have tried for a few weeks to fix this issue but to no avail. Here is the wireless info script output 

########## wireless info START ##########

Report from: 04 Oct 2018 07:40 EDT -0400

Booted last: 04 Oct 2018 00:00 EDT -0400

Script from: 10 Jan 2018 20:04 UTC +0000

##### release ###########################

Distributor ID: Ubuntu
Description:    Ubuntu 18.04.1 LTS
Release:    18.04
Codename:   bionic

##### kernel ############################

Linux 4.15.0-34-generic #37-Ubuntu SMP Mon Aug 27 15:21:48 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Parameters: ro, quiet, splash, vt.handoff=1

##### desktop ###########################

Lubuntu

##### lspci #############################

01:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM43142 802.11b/g/n [14e4:4365] (rev 01)
    Subsystem: Dell Wireless 1704 802.11n + BT 4.0 [1028:0016]
    Kernel modules: bcma, wl

02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL810xE PCI Express Fast Ethernet controller [10ec:8136] (rev 05)
    Subsystem: Dell RTL810xE PCI Express Fast Ethernet controller [1028:0564]
    Kernel driver in use: r8169

##### lsusb #############################

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 0bda:58bf Realtek Semiconductor Corp. 
Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

##### PCMCIA card info ##################

##### rfkill ############################

##### lsmod #############################

wl                   6447104  0
dell_laptop            20480  0
cfg80211              651264  1 wl
dell_wmi               16384  0
dell_smbios            16384  3 dell_wmi,dell_laptop,dell_smbios_smm
compat                 16384  1 cfg80211
dell_wmi_descriptor    16384  1 dell_wmi
sparse_keymap          16384  1 dell_wmi
wmi_bmof               16384  0
wmi                    24576  3 dell_wmi,wmi_bmof,dell_wmi_descriptor
video                  45056  3 dell_wmi,dell_laptop,i915

##### interfaces ########################

[/etc/network/interfaces]
auto lo
iface lo inet loopback

##### ifconfig ##########################

1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback  brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp2s0:  mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether  brd 
    inet 192.168.1.69/24 brd 192.168.1.255 scope global dynamic noprefixroute enp2s0
       valid_lft 84907sec preferred_lft 84907sec
    inet6 fe80::7ca1:87ad:2097:59fa/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

##### iwconfig ##########################

lo        no wireless extensions.

enp2s0    no wireless extensions.

##### route #############################

default via 192.168.1.254 dev enp2s0 proto dhcp metric 100 
192.168.1.0/24 dev enp2s0 proto kernel scope link src 192.168.1.69 metric 100 

##### resolv.conf #######################

nameserver 127.0.0.53
search lan

##### network managers ##################

Installed:

    NetworkManager

Running:

root       540     1  0 07:14 ?        00:00:00 /usr/sbin/NetworkManager --no-daemon

##### NetworkManager info ###############

GENERAL.DEVICE:                         enp2s0
GENERAL.TYPE:                           ethernet
GENERAL.NM-TYPE:                        NMDeviceEthernet
GENERAL.VENDOR:                         Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT:                        RTL810xE PCI Express Fast Ethernet controller
GENERAL.DRIVER:                         r8169
GENERAL.DRIVER-VERSION:                 2.3LK-NAPI
GENERAL.FIRMWARE-VERSION:               --
GENERAL.HWADDR:                         
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.REASON:                         0 (No reason given)
GENERAL.UDI:                            /sys/devices/pci0000:00/0000:00:1c.4/0000:02:00.0/net/enp2s0
GENERAL.IP-IFACE:                       enp2s0
GENERAL.IS-SOFTWARE:                    no
GENERAL.NM-MANAGED:                     yes
GENERAL.AUTOCONNECT:                    yes
GENERAL.FIRMWARE-MISSING:               no
GENERAL.NM-PLUGIN-MISSING:              no
GENERAL.PHYS-PORT-ID:                   --
GENERAL.CONNECTION:                     Wired connection 1
GENERAL.CON-UUID:                       e950e564-f418-385e-bf25-a9677f55feea
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/1
GENERAL.METERED:                        no (guessed)
CAPABILITIES.CARRIER-DETECT:            yes
CAPABILITIES.SPEED:                     100 Mb/s
CAPABILITIES.IS-SOFTWARE:               no
CAPABILITIES.SRIOV:                     no
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.1.69/24
IP4.GATEWAY:                            192.168.1.254
IP4.ROUTE[1]:                           dst = 0.0.0.0/0, nh = 192.168.1.254, mt = 100
IP4.ROUTE[2]:                           dst = 192.168.1.0/24, nh = 0.0.0.0, mt = 100
IP4.DNS[1]:                             192.168.1.254
IP4.DOMAIN[1]:                          lan
DHCP4.OPTION[1]:                        requested_domain_search = 1
DHCP4.OPTION[2]:                        requested_interface_mtu = 1
DHCP4.OPTION[3]:                        requested_broadcast_address = 1
DHCP4.OPTION[4]:                        requested_domain_name = 1
DHCP4.OPTION[5]:                        requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[6]:                        requested_time_offset = 1
DHCP4.OPTION[7]:                        time_offset = 0
DHCP4.OPTION[8]:                        expiry = 1538738167
DHCP4.OPTION[9]:                        requested_netbios_scope = 1
DHCP4.OPTION[10]:                       next_server = 192.168.1.254
DHCP4.OPTION[11]:                       requested_wpad = 1
DHCP4.OPTION[12]:                       broadcast_address = 192.168.1.255
DHCP4.OPTION[13]:                       requested_subnet_mask = 1
DHCP4.OPTION[14]:                       dhcp_lease_time = 86400
DHCP4.OPTION[15]:                       ip_address = 192.168.1.69
DHCP4.OPTION[16]:                       dhcp_message_type = 5
DHCP4.OPTION[17]:                       requested_static_routes = 1
DHCP4.OPTION[18]:                       requested_domain_name_servers = 1
DHCP4.OPTION[19]:                       host_name = ciara-Inspiron-5720
DHCP4.OPTION[20]:                       routers = 192.168.1.254
DHCP4.OPTION[21]:                       domain_name = lan
DHCP4.OPTION[22]:                       requested_ntp_servers = 1
DHCP4.OPTION[23]:                       requested_netbios_name_servers = 1
DHCP4.OPTION[24]:                       domain_name_servers = 192.168.1.254
DHCP4.OPTION[25]:                       requested_routers = 1
DHCP4.OPTION[26]:                       requested_ms_classless_static_routes = 1
DHCP4.OPTION[27]:                       subnet_mask = 255.255.255.0
DHCP4.OPTION[28]:                       requested_host_name = 1
DHCP4.OPTION[29]:                       network_number = 192.168.1.0
DHCP4.OPTION[30]:                       dhcp_server_identifier = 192.168.1.254
IP6.ADDRESS[1]:                         fe80::7ca1:87ad:2097:59fa/64
IP6.GATEWAY:                            --
IP6.ROUTE[1]:                           dst = ff00::/8, nh = ::, mt = 256, table=255
IP6.ROUTE[2]:                           dst = fe80::/64, nh = ::, mt = 256
IP6.ROUTE[3]:                           dst = fe80::/64, nh = ::, mt = 100
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{2}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]:   e950e564-f418-385e-bf25-a9677f55feea | Wired connection 1

##### NetworkManager.state ##############

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true

##### NetworkManager.conf ###############

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=false

[device]
wifi.scan-rand-mac-address=no

[device]
wifi.scan-rand-mac-address=no

##### NetworkManager profiles ###########

[[/etc/NetworkManager/system-connections/plusnet]] (600 root)
[connection] id=plusnet | type=wifi | permissions=
[wifi] mac-address-blacklist= | ssid=PLUSNET-RTKZ
[ipv4] method=auto
[ipv6] method=auto

##### Netplan config ####################

[/etc/netplan/01-network-manager-all.yaml]
network:
  version: 2
  renderer: NetworkManager

##### iw reg get ########################

Region: America/New_York (based on set time zone)

global
country 00: DFS-UNSET
    (2402 - 2472 @ 40), (N/A, 20), (N/A)
    (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
    (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
    (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
    (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
    (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
    (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
    (57240 - 63720 @ 2160), (N/A, 0), (N/A)

##### iwlist channels ###################

lo        no frequency information.

enp2s0    no frequency information.

##### iwlist scan #######################

lo        Interface doesn't support scanning.

enp2s0    Interface doesn't support scanning.

##### module infos ######################

[wl]
filename:       /lib/modules/4.15.0-34-generic/updates/dkms/wl.ko
license:        MIXED/Proprietary
license:        MIXED/Proprietary
srcversion:     60D2D7E603B418654C8C9AA
depends:        cfg80211
retpoline:      Y
name:           wl
vermagic:       4.15.0-34-generic SMP mod_unload 
parm:           passivemode:int
parm:           wl_txq_thresh:int
parm:           oneonly:int
parm:           piomode:int
parm:           instance_base:int
parm:           nompc:int
parm:           intf_name:string

[cfg80211]
filename:       /lib/modules/4.15.0-34-generic/updates/net/wireless/cfg80211.ko
version:        iwlwifi-stack-public:master:7276:8a669024
description:    wireless configuration support
license:        GPL
author:         Johannes Berg
srcversion:     E44E0187B00EA3749FD374F
depends:        compat
retpoline:      Y
name:           cfg80211
vermagic:       4.15.0-34-generic SMP mod_unload 
parm:           bss_entries_limit:limit to number of scan BSS entries (per wiphy, default 1000) (int)
parm:           ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm:           cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)

##### module parameters #################

[cfg80211]
bss_entries_limit: 1000
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00

##### /etc/modules ######################

##### modprobe options ##################

[/etc/modprobe.d/amd64-microcode-blacklist.conf]
blacklist microcode

[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci

[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac
blacklist r8169

[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off

[/etc/modprobe.d/broadcom-sta-dkms.conf]
blacklist b43
blacklist b43legacy
blacklist b44
blacklist bcma
blacklist brcm80211
blacklist brcmsmac
blacklist ssb

[/etc/modprobe.d/intel-microcode-blacklist.conf]
blacklist microcode

[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211

[/etc/modprobe.d/libpisock9.conf]
blacklist visor

[/etc/modprobe.d/rtl8723de.conf]
options rtl8723de ant_sel=2

##### rc.local ##########################

grep: /etc/rc.local: No such file or directory

##### pm-utils ##########################

##### udev rules ########################

##### dmesg #############################

[   25.109705] name 'brcm_monitor0'
[   25.109777]  wl_free+0xcb/0x280 [wl]
[   25.109855]  wl_pci_probe+0x648/0xf75 [wl]
[   25.109900]  wl_module_init+0x89/0x8b [wl]
[   37.378321] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[   37.677903] r8169 0000:02:00.0 enp2s0: link down
[   37.678011] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[  118.892086] r8169 0000:02:00.0 enp2s0: link up
[  118.892100] IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0: link becomes ready

########## wireless info END ############

Any help would be massively appreciated. I'm not a techie, so it is probably something really simple that I'm missing.

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1 Answer 1

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It appears that you have no kernel driver in use for the card. It shows that there are 2 kernel modules, and one of them is blacklisted (which is fine):

##### lspci #############################

01:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries 
BCM43142 802.11b/g/n [14e4:4365] (rev 01)
Subsystem: Dell Wireless 1704 802.11n + BT 4.0 [1028:0016]
Kernel modules: bcma, wl   <<------------------

02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL810xE PCI Express Fast Ethernet controller [10ec:8136] (rev 05)
Subsystem: Dell RTL810xE PCI Express Fast Ethernet controller [1028:0564]
Kernel driver in use: r8169


[/etc/modprobe.d/broadcom-sta-dkms.conf]
blacklist b43
blacklist b43legacy
blacklist b44
blacklist bcma     <<---------------
blacklist brcm80211
blacklist brcmsmac
blacklist ssb

1.) First update apt-get:

apt-get update

2.) Then update Linux Headers (this code will determine "your" systems necessary headers) and install Broadcom DKMS:

apt-get install linux-image-$(uname -r|sed 's,[^-]*-[^-]*-,,') linux-headers-$(uname -r|sed 's,[^-]*-[^-]*-,,') broadcom-sta-dkms

3.) Remove any possible active drivers for the Broadcom WiFi adapter:

modprobe -r b44 b43 b43legacy ssb brcmsmac bcma

4.) Activate the wl driver for the Broadcom WiFi adapter:

modprobe wl

5.) Always best to reboot your system after things like this:

reboot

This will give you FULL functionality of this WiFi adapter. You will be able to connect to 5GHz networks, even put your adapter in monitor mode, if you were so inclined.

It is possible that simply just using modprobe wl would suffice for you, since it appears that you have the kernel module installed, just not in use. I guess you could try that first, and if not, follow full instructions. Hope this helps. \

Also, this will keep you using a Broadcom Driver, not Realtek. See https://wiki.debian.org/wl for more info on Broadcom wl driver.

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